This is exactly the kind of thread I've been looking for recently, I just didn't know how to word what I was looking for. I'm really into Sigh's "Gallows Gallery", which to me is a more experimental/eclectic version of this style, but can't find much else like that. Will definitely keep an eye on this thread.Also, since it might apply to what the OP is looking for, here's a track from that album: http://www.youtube.com/watch?v=4B6az2nciSU

Bible of the Devil's last two or three full-lengths. A few of the tracks sound exactly like golden age Thin Lizzy.And also Valkyrie (this one) if you don't mind the doomier approach. Sabbath meets Lizzy/Maiden kind of deal.

Mark Shelton plays guitar, and he layers his guitar solos like Tony Iommi did on early Sabbath albums-- one solo coming out the left channel, and another solo coming out the right channel at the same time.

The Devils Blood sound a lot like early Thin Lizzy among their other 70's influences (The Coven, Roky Erickson & Wishbone Ash) Check Ghost from Sweden, they sound like Mercyful Fate would sound if they would record their first album on 1974 , You will find a lot of proto metal harmonized guitars here.

You propably know them but mentioning just in case, Blue Oyster Cult, Wishbone Ash, Uriah Heep. Also Tygers of Pan Tang John Sykes band before he joined Thin Lizzy